Languagessimplified chinese english capacity mah80 materialsilicone sim card typeno sim card slot connectivitybluetooth40 fitness wellnessalarm clock sleep tracker activity tracker call reminder community share cpunrf51822 ramother charging timeh15 typesmart bracelet featurespedometers calories burned heart rate monitor water resistant water proof information touch screen sports distance tracking blood pressure measurement modelr3 sensorfinger sensor heart rate